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.• <br />Memo to Dan Mathews <br />Deserado Mine TR-48, Subsidence <br />page 4 <br />highest probability of discernable damage to Rio Blanco County Road 65 would be <br />above the southeast corner of panel LW-2B and above the northeastern rib of panel <br />LW-5B. I would recommend that hazard warning signs be place in the vicinity of <br />these two specific locations and that particular interest be focused upon them <br />during daily inspections for subsidence-related road damage. <br />§III.A.7.j Red Wash and Scullion Gulch (pages III-21 & III-22) <br />As I stated above, I believe that cracks within the peripheral area of longwall mining <br />and above the chain pillars may tend to take longer to develop, may be wider and <br />deeper, and will tend to remain open longer, then the more transient cracks directly <br />above the panels. Particular attention should be focused upon the area within <br />Scullion Gulch immediately above the southeastern corner of panel LW-1 B. When <br />longwall retreat commences in this area I recommend visual monitoring be <br />conducted several times a week until retreat has proceeded a distance from the <br />channel equal to at least the depth of the seam. <br />Conclusion <br />As I stated in my opening, the Deserado Mine has proven to be responsible in <br />relation to its prediction, monitoring and mitigation of subsidence impacts during <br />it's mining within the D-Seam. I have no reason to expect a change in its <br />responsible treatment of this permit topic. With appropriate response to the above <br />concerns, I am sure that the subsidence aspects of TR-48 will be rendered <br />completely acceptable. <br />Please forward BME's supplemental response to me for review upon it's receipt. <br />Cc: Larry Routten <br />doc: M:\COAL\JAP\DESBSEAM.WPD <br />JP/1P <br />